It’s wrong because there’s a freak snowstorm in Seattle and it’s 39°F there right now and it’s 81°F in Kansas City. So the average temp between those two place is 60°F which tells us nothing useful about either place.
Over longer time the US average temp is useful, it tells us something about the climate, not the weather. Maybe that analogy kinda works for the economy.
Sure, but prices are up everywhere for most goods. Are prices actually down for anything significant right now? So using the weather analogy, it is hot everywhere in the US.